Synonyms and related words :
abettor, actuator, afflatus, animating spirit, animation, animator, animus, cajoler, coax, coaxer, divine afflatus, encourager, energizer, enlivenment, exhilaration, fire, firer, firing, gadfly, galvanizer, genius, impeller, inducer, infection, infusion, inspiration, inspirer, mover, persuader, pleader, prime mover, prompter, spark, spark plug, sparker, stimulator, tempter, wheedler